Drug Coverage

TRICARE covers most prescription drugs approved by the U.S. Food and Drug Administration. The TRICARE Formulary is a list of generic and brand-name prescription drugs TRICARE covers. Check the formulary for coverage information for specific drugs.

Prescription drugs may be covered under the TRICARE pharmacy benefit or the medical benefit.

Compound Drugs

Compound drugs are a combination of two or more drugs. They’re prepared by a pharmacist for a patient’s individual needs.

Screening Process for Compound Drugs

Step 1: Electronic Screen

Express Scripts screens each ingredient to make sure:

  • TRICARE covers it.
  • It’s safe and effective.
  • It’s medically necessary.

This step usually takes less than five seconds to complete.

Step 2: Required if the Compound Doesn’t Pass Step 1

If the compound drug—or any ingredient in it—doesn’t pass the first step, your pharmacist can:

  • Remove the non-covered ingredient or replace it with a covered ingredient.
  • Contact your doctor to request a different drug to treat your condition.

This step happens while you wait at the pharmacy. It may take 15 to 20 minutes.

Step 3: Prior Authorization

Your doctor can request prior authorization for the compound drug if they can’t substitute an ingredient or prescribe a different drug for you. This allows Express Scripts to individually review your prescription to make sure it’s safe, effective, and medically necessary.

To request prior authorization:

This step usually takes about five days from when Express Scripts gets all the necessary paperwork.

If your compound drug doesn’t get approved, you have 90 days to request a formal appeal.

Prescription Quantity Limits

Quantity limits vary by type of pharmacy:

Exceptions can be made if your provider establishes medical necessity.

Last Updated 9/28/2026